15k in 15 months is optimum running....not much not less....
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I hope you have done your first 3 maintenances through HONDA....that is 1k, 5k and 10k.....and oil and oil filter and air filter was replaced in these.
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these first 3 services must be logged on ur book, because in case (hope not) if u face any warranty issue the dealership will see these first 3 logs....after that you may scatter ur visits to them and keep log accordingly...
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Pls ignore their calls and procedures they try to impose on us of visiting them and changing oil evry 3 months regardless of running.....its not required.....most owners follow changing oil at evry 5k km, some at 8k and some at 10k....i hv seen here in forum most of em follow 5k changes
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In ur manual there wud be table mentioning all about inspecting and replacing things wrt ur running.....follow that specially for critical parts like transmission oil, plugs, timing belt, coolant, and others if i missed whch any one else here can point out
